CN102866367A - Demagnetization detecting device and demagnetization detecting method thereof - Google Patents
Demagnetization detecting device and demagnetization detecting method thereof Download PDFInfo
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- CN102866367A CN102866367A CN2011101985308A CN201110198530A CN102866367A CN 102866367 A CN102866367 A CN 102866367A CN 2011101985308 A CN2011101985308 A CN 2011101985308A CN 201110198530 A CN201110198530 A CN 201110198530A CN 102866367 A CN102866367 A CN 102866367A
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Abstract
The invention provides a demagnetization detecting device and a demagnetization detecting method thereof. The demagnetization detecting device is electrically connected into a power control unit of a permanent magnet motor to be detected, and the power control unit is electrically connected to a direct-current power supply. The demagnetization detecting device senses voltage to be detected and current to be detected of the direct-current power supply, and calculates power to be detected of the direct-current power supply according to the voltage to be detected and the current to be detected. Besides, the demagnetization detecting device judges the difference between the power to be detected and standard power, and judges demagnetization of the permanent magnet motor to be detected according to the difference.
Description
Technical field
The present invention is about a kind of demagnetization pick-up unit and demagnetization detection method thereof; More specifically, demagnetization pick-up unit of the present invention and demagnetization detection method thereof mainly by the direct supply power of instant detection power control module and the difference of calibration power, judge whether permanent-magnetic electric machine to be measured demagnetizes.
Background technology
Because material science and technology is flourish, so that the process technique of the permanent magnet of high energy product reaches its maturity, related so that related industry is indebted to this.For example, the electric motor car industry exploitation that actively drops in recent years permanent magnet motor both at home and abroad namely is the excellent specific property of wishing by permanent magnet, makes the permanent magnet motor can be towards future developments such as high power density and high-level efficiency.
And when permanent magnet motor is applied to the drive unit of electric motor car; can the large torque of the slow-speed of revolution and high-revolving conditional operation in order to satisfy electric motor car; usually can carry out to the permanent magnet motor of drive unit magnetic control system a little less than the universe, to reach comparatively ideal output usefulness.In other words, by magnetic control system a little less than the universe, with the magnetic of capable of regulating permanent magnet motor when the start, further control the drive unit of electric motor car in the operation of various rotating speeds and torque.
Yet, when magnetic control is processed a little less than permanent magnet motor is carried out universe, will allow the permanent magnet of permanent magnet motor be in for a long time erasing field, and then so that the rotor of permanent magnet motor is accumulated heat because of iron loss, and in case the heat of accumulation causes the temperature of permanent magnet to exceed the restriction of its magnetic flux density-Magnetic field strength curve (being BH curve), may cause permanent magnet to present demagnetized state.Further, when permanent magnet presents demagnetized state, the magnetic flux density of permanent magnet and coercive field will suddenly weaken, and this demagnetized state is irreversible phenomenon, in other words, even the temperature of the permanent magnet after the demagnetization is lowered in subsequent process, the magnetic flux density that weakens and coercive field still can't be reduced to original state.
Accordingly, in case the permanent magnet of permanent magnet motor presents demagnetized state, will cause the running torque of permanent magnet motor suddenly to reduce, and then so that the electric motor car abnormal take permanent magnet motor as drive unit.For example, when permanent magnet motor is applied to electric motor car, the power size that the running torque is stepped on the gas according to driving determines, and when the permanent magnet of permanent magnet motor presents demagnetized state, to cause actual operation torque ratio user expection little of permanent magnet motor, thus, if when the permanent magnet of permanent magnet motor presents demagnetized state in the driving process, to cause driving can't be as expectedly travelling by the accelerator control electric motor car, and then increase the danger of driving.
And in conventional art, overheated for fear of permanent magnet motor, common meeting set temperature sensing element in the stator of permanent magnet motor is in order to the temperature of sensing permanent magnet motor when operating.Yet, the temperature sensor that is arranged at stator only can measure for the temperature variation of stator, it also can't correctly sense the temperature of rotor, more leisure opinion detect permanent magnet motor permanent magnet temperature and whether demagnetize, therefore, determine the temperature of permanent magnet motor integral body if want to detect the mode of stator temperature, and then judge whether permanent magnet demagnetizes to have the error of certain degree with uncertain.
In view of this, how effectively and correctly to detect permanent magnet motor and whether present demagnetized state, really need the problem of solution for the dealer in this field badly.
Summary of the invention
Of the present invention be to provide a kind of demagnetization pick-up unit and the demagnetization detection method, it is mainly used in being electrically connected to the power control unit of permanent magnet motor to be measured, and the power that is electrically connected to the direct supply of power control unit by detection changes, and judges that permanent-magnetic electric machine to be measured presents demagnetized state.
For reaching above-mentioned purpose, the invention provides a kind of demagnetization pick-up unit.This demagnetization pick-up unit is used for being electrically connected to a power control unit of a permanent magnet motor to be measured, and wherein this power control unit more is electrically connected to a direct current power supply.This demagnetization pick-up unit comprises the processing unit that a storer, a voltage sensor, a current sensor and are electrically connected to this storer, this voltage sensor and this current sensor.This storer is in order to store a calibration power value corresponding to a standard torque value of a standard permanent magnet motor and a corresponding relation of a rated rotational frequency value.This voltage sensor, in order to a magnitude of voltage to be measured of this direct supply of sensing, and this current sensor, in order to a current value to be measured of this direct supply of sensing.This processing unit is in order to calculate a performance number to be measured of this direct supply according to this magnitude of voltage to be measured and this current value to be measured, wherein this performance number to be measured is corresponding to a torque value to be measured and a tachometer value to be measured of this permanent magnet motor to be measured.This processing unit is more based on this corresponding relation, when this torque value to be measured equals this standard torque value and this tachometer value to be measured and equals this rated rotational frequency value, judge a difference of this performance number to be measured and this calibration power value, and present a demagnetized state according to this permanent-magnetic electric machine to be measured of this diversity judgement.
For reaching above-mentioned purpose, the present invention more provides a kind of demagnetization detection method for a demagnetization pick-up unit.This demagnetization pick-up unit is used for being electrically connected to a power cell of a permanent magnet motor to be measured, and wherein this power control unit more is electrically connected a direct current power supply.This demagnetization pick-up unit comprises the processing unit that a storer, a voltage sensor, a current sensor and are electrically connected to this storer, this voltage sensor and this current sensor.This demagnetization detection method comprises the following step: (a) make this memory storage one calibration power value corresponding to a standard torque value of a standard permanent magnet motor and a corresponding relation of a rated rotational frequency value; (b) make a magnitude of voltage to be measured of this this direct supply of voltage sensor sensing; (c) make a current value to be measured of this this direct supply of current sensor sensing; (d) make this processing unit this magnitude of voltage to be measured of basis and this current value to be measured calculate a performance number to be measured of this direct supply, wherein this performance number to be measured is corresponding to a torque value to be measured and a tachometer value to be measured of this permanent magnet motor to be measured; And (e) make this processing unit based on this corresponding relation, when this torque value to be measured equals this standard torque value and this tachometer value to be measured and equals this rated rotational frequency value, judge a difference of this performance number to be measured and this calibration power value, and present a demagnetized state according to this permanent magnet motor to be measured of this diversity judgement.
Technical characterictic by above-mentioned exposure, demagnetization pick-up unit of the present invention and demagnetization detection method thereof can be effectively and are correctly detected permanent magnet motor and whether present demagnetized state, guarantee further to use the security of electric motor car when driving of permanent magnet motor.
After consulting embodiment graphic and that describe subsequently, this technical field has knows that usually the knowledgeable just can understand other purposes of the present invention, and technological means of the present invention and enforcement aspect.
Description of drawings
Figure 1A is the synoptic diagram that the demagnetization pick-up unit of first embodiment of the invention carries out primary standard;
Figure 1B is the calibration power value of first embodiment of the invention and the relativeness synoptic diagram between standard torque value and rated rotational frequency value;
Fig. 1 C is the synoptic diagram that the demagnetization pick-up unit of first embodiment of the invention demagnetizes and tests;
Fig. 2 A is the process flow diagram of the demagnetization detection method primary standard of second embodiment of the invention; And
Fig. 2 B is the process flow diagram that the demagnetization detection method of second embodiment of the invention is demagnetized and tested.
[main element symbol description]
1 power control unit
11 demagnetization pick-up units
111 storeies
113 voltage sensors
115 current sensors
117 processing units
20 standard voltage value
21 magnitudes of voltage to be measured
22 standard current value
23 current values to be measured
24 calibration power values
26 corresponding relations
3 direct supplys
42 standard torque values
43 torque values to be measured
44 rated rotational frequency values
45 tachometer values to be measured
5 standard permanent magnet motors
7 permanent magnet motors to be measured
Embodiment
Below will explain content of the present invention by embodiment.The palpus expositor, embodiments of the invention are not to limit the present invention must can implement such as the described any specific environment of embodiment, application or particular form.Therefore, the explanation of relevant embodiment only is explaination purpose of the present invention, but not in order to limiting the present invention, and this case scope of asking, and is as the criterion with claim.In following examples and graphic in, omit and do not illustrate with the non-directly related element of the present invention, and in graphic each interelement size relationship only for asking easy understanding, non-in order to limit actual ratio.
Please refer to Figure 1A, it carries out the synoptic diagram of primary standard for a demagnetization pick-up unit 11 of first embodiment of the invention.Demagnetization pick-up unit 11 in actual demagnetize detect before, must utilize first the standard permanent magnet motor to carry out the flow process of primary standard, to record the state of normal permanent magnet motor under various operations.
At first, shown in Figure 1A, demagnetization pick-up unit 11 is used for being electrically connected to a power control unit 1 of a standard permanent magnet motor 5, and power control unit 1 more is electrically connected to a direct current power supply 3.Wherein, power control unit 1 more comprises a power transfer module 13, is converted to three-phase alternating current in order to the direct current with single-phase DC power supply 3, uses in order to do standard permanent magnet motor 5.Demagnetization pick-up unit 11 comprises the processing unit 117 that a storer 111, a voltage sensor 113, a current sensor 115 and are electrically connected to storer 111, voltage sensor 113 and current sensor 115.
The person of should be specified knows that usually the knowledgeable directly understands because the basic function that direct supply, power control unit and permanent magnet motor have and annexation each other can be affiliated field tool, repeats no more in this.And function and the interaction of each element of demagnetization pick-up unit 11 will describe in detail in following content.
Please continue to consult Figure 1A, demagnetization pick-up unit 11 can utilize first standard permanent magnet motor 5 to carry out initialized flow process before formally demagnetizing in reaching the standard grade and detecting.Particularly, when direct supply 3 passes through power control unit 1, when providing electrical power to standard permanent magnet motor 5, the demagnetization pick-up unit 11 of being located at power control unit 1 just can utilize voltage sensor 113 and current sensor 115, respectively a standard voltage value 20 and a standard current value 22 of senses DC power 3.
Then, the standard permanent magnet motor can produce a standard torque value 42 and a rated rotational frequency value 44 by the loaded with standard device, and standard torque value 42 and rated rotational frequency value 44 are back to processing unit 117.Simultaneously, voltage sensor 113 and current sensor 115 respectively will be separately standard voltage value 20 and the standard current value 22 of institute's sensing be sent to processing unit 117, and processing unit 117 just calculates a calibration power value 24 according to this.Thus, by aforementioned setting, processing unit 117 can be known the relativeness of 44 of the standard torque value 42 of calibration power value 24 and standard permanent magnet motor 5 and rated rotational frequency values according to this.
Please in the lump with reference to Figure 1B, it is the relativeness synoptic diagram of 44 of calibration power value 24 and standard torque value 42 and rated rotational frequency values.Particularly, processing unit 117 just corresponding concerns that 26 form is recorded in the storer 117 with it with one after the relativeness of 44 of the standard torque value 42 of knowing calibration power value 24 and standard permanent magnet motor 5 and rated rotational frequency values.Further, the storing mode of corresponding relation 26 in storer 111, mode that can form is explained, as shown in the figure, calibration power value 24 is corresponding to standard torque value 42 and rated rotational frequency value 44, in other words, when the torque of standard permanent magnet motor 5 and rotating speed reached respectively standard torque value 42 and rated rotational frequency value 44, it answered corresponding output power to be calibration power value 24.
Via aforesaid mode, the demagnetization pick-up unit can record the relation of permanent magnet motor its power stage and torque and rotating speed when normal operation, then, when other connatural permanent magnet motors when using, the demagnetization pick-up unit can judge whether according to this that the demagnetization situation produces.In detail, please then consult Fig. 1 C, it is the synoptic diagram that the demagnetization pick-up unit 11 of first embodiment of the invention demagnetizes and tests, and as shown in the figure, former standard permanent magnet motor 5 in order to the primary standard flow process has replaced with a permanent magnet motor 7 to be measured.
The person of should be specified, the annexation between permanent magnet motor 7 to be measured and other elements (such as power control unit 1 and demagnetization pick-up unit 11) is identical with other interelement annexations with standard permanent magnet motor 5, repeats no more in this.In addition, for convenience of explanation, the demagnetization pick-up unit 11 of the first embodiment is applied to standard permanent magnet motor 5 to carry out primary standard, and be applied to simultaneously permanent magnet motor 7 to be measured to have judged whether the generation of demagnetization phenomenon, yet, the enforcement aspect that it is not intended to limiting the invention, those skilled in the art can be according to aforesaid content, with the difference demagnetization pick-up unit of congenerous, be applied to respectively on standard permanent magnet motor and the permanent magnet motor to be measured easily.
And in the demagnetization test, similarly, when direct supply 3 passes through power control unit 1, when providing electrical power to permanent magnet motor 7 to be measured, the demagnetization pick-up unit 11 of being located at power control unit 1 just can utilize voltage sensor 113 and current sensor 115, respectively a magnitude of voltage 20 to be measured and a current value 22 to be measured of senses DC power 3.Then, voltage sensor 113 and current sensor 115 respectively will be separately magnitude of voltage to be measured 20 and the current value to be measured 22 of institute's sensing be sent to processing unit 117, and processing unit 117 just calculates a performance number to be measured (not illustrating) according to magnitude of voltage 20 to be measured and current value to be measured 22.
Similarly, permanent magnet motor 7 to be measured is when difference torque 43 to be measured and rotating speed 45 to be measured, can record magnitude of voltage to be measured 20 and current value 22 to be measured that voltage sensor 113 and current sensor 115 sense, and magnitude of voltage 20 to be measured and current value to be measured 22 values be back to processing unit 117, thus, processing unit 117 can be known the relativeness of 45 of the torque value to be measured 43 of this performance number to be measured and permanent magnet motor to be measured 7 and tachometer values to be measured according to this.
Then, because the storer 111 of demagnetization pick-up unit 11 contains calibration power value 24, therefore, when torque value 41 to be measured equals standard torque value 42 and tachometer value to be measured 43 and equals rated rotational frequency value 44, processing unit 117 just can be judged a difference (not illustrating) of this performance number to be measured and calibration power value 24 according to this, and whether presents a demagnetized state according to this diversity judgement permanent-magnetic electric machine 7 to be measured.
In detail, when torque value 41 to be measured equals standard torque value 42 and tachometer value to be measured 43 and equals rated rotational frequency value 44, if permanent magnet motor 7 to be measured does not present demagnetized state, then this performance number to be measured in theory should be identical with calibration power value 24, or difference between the two should drop on rational scope.Otherwise if permanent magnet motor to be measured 7 has presented demagnetized state, then 24 of this performance number to be measured and calibration power values will have obvious difference.Hereat, by the difference of 24 of this performance number to be measured and calibration power values, can judge easily whether permanent-magnetic electric machine 7 to be measured presents demagnetized state.
Palpus lay special stress on person, content by aforementioned exposure, demagnetization pick-up unit 11 of the present invention also can be applied in the system of the two permanent magnet motors of tool easily, in other words, demagnetization pick-up unit 11 of the present invention can be when power control unit 1 be electrically connected at standard permanent magnet motor 5 and permanent magnet motor 7 to be measured simultaneously, to the permanent magnet motor 7 to be measured test of demagnetizing.Particularly, when standard permanent magnet motor 5 and permanent magnet motor 7 to be measured are positioned at system simultaneously, demagnetization pick-up unit 11 of the present invention can carry out aforementioned primary standard flow process for standard permanent magnet motor 5 simultaneously, and for the test of permanent magnet motor 7 to be measured.
In addition, processing unit 117 more can be in order to define a calibration power scope (not illustrating) according to calibration power value 24, and when the difference of 24 of this performance number to be measured and calibration power values exceeds this calibration power scope, judge that permanent magnet motor 7 to be measured presents this demagnetized state.For example, in the first embodiment, this calibration power scope can be situated between due to calibration power value 24 80 percent to 120 of one of percentages.Thus, processing unit 117 can reduce the erroneous judgement that external factor causes by the definition of this calibration power scope, and then increase judges whether permanent magnet motor 7 to be measured presents the elasticity of demagnetized state.Jie of right aforementioned this calibration power scope limits enforcement aspect of the present invention, and it can carry out corresponding adjustment according to the difference of environment.
The person of should be specified, for ease of understanding, the first embodiment only sets forth concept of the present invention with the corresponding relation of single standard performance number and one group of standard torque value and rated rotational frequency value, the enforcement aspect of so it is not intended to limiting the invention corresponding relation, those skilled in the art can be by aforementioned content of taking off, know easily the various criterion performance number with not on the same group the standard torque value and the corresponding relation of rated rotational frequency value.
Particularly, voltage sensor of the present invention and current sensor can be in response to various criterion torque value and the rated rotational frequency values of standard permanent magnet motor, sense different direct supply standard voltage value and standard current value, and processing unit just can be according to the standard voltage value that records and standard current value, calculate the plural calibration power value corresponding to various criterion torque value and rated rotational frequency value, and it is stored in the storer.
Accordingly, processing unit can be according to permanent magnet motor to be measured torque value to be measured and tachometer value to be measured instantly, immediately calculate performance number to be measured, subsequently again in storer, hunt out the standard torque value identical with torque value to be measured and tachometer value to be measured and the corresponding calibration power value of rated rotational frequency value, last again with the calibration power value that hunts out as judgement basis, if performance number to be measured and calibration power value are more variant, the running situation that then represents permanent magnet motor to be measured is different from the running situation of standard permanent magnet motor, therefore can judge according to this that just permanent-magnetic electric machine to be measured presents demagnetized state.
Palpus is the expositor in addition, usually has micro-control unit (micro control unit in the power control unit, MCU), it also comprises storer and processor, therefore, in different enforcement aspects, the storer of demagnetization pick-up unit and processing unit can be responsible for different operation procedures separately from the micro-control unit of power control unit, if so consider the factor of cost and electronic component arrangements, in the storer and processing unit that the micro-control unit of the operation procedure that also storer and the processing unit of demagnetizer can be responsible for embedding power control unit comprises.Accordingly, the present invention does not limit the storer of demagnetization pick-up unit and the enforcement aspect of processing unit.
The second embodiment of the present invention is a demagnetization detection method, and it can be used for a demagnetization pick-up unit (such as the demagnetization pick-up unit 11 of the first embodiment).Before this demagnetization pick-up unit demagnetizes in reaching the standard grade and detects, must carry out first the flow process of primary standard for the standard permanent magnet motor, in order to record the state of normal permanent magnet motor under various operations.Wherein, this demagnetization pick-up unit is used for being electrically connected to a power cell of a standard permanent magnet motor, and this power control unit more is electrically connected a direct current power supply.This demagnetization pick-up unit comprises the processing unit that a storer, a voltage sensor, a current sensor and are electrically connected to this storer, this voltage sensor and this current sensor, and the primary standard flow process is as follows.
Please refer to Fig. 2 A, it is the process flow diagram of the demagnetization detection method primary standard of second embodiment of the invention.At first, execution in step S201 makes this voltage sensor when this power control unit connects this standard permanent magnet motor, a standard voltage value of this direct supply of sensing.Then, execution in step S203 makes this current sensor when this power control unit connects this standard permanent magnet motor, a standard current value of this direct supply of sensing.Subsequently, execution in step S205 makes this processing unit calculate this calibration power value according to this standard voltage value and this standard current value.
Need special instruction person, this standard permanent magnet motor is based under various criterion torque value and the rated rotational frequency value, this standard voltage value and this standard current value that are sensed by voltage sensor and current sensor, and this standard voltage value and this standard current value be back to this processing unit, thus, this processing unit can be known this standard torque value of this calibration power value and this standard permanent magnet motor and the relativeness between this rated rotational frequency value according to this.
Just can know by aforesaid mode, under normal conditions, the relation of permanent magnet motor its power stage and torque and rotating speed when normal operation, and carry out according to this record.Then, when other connatural permanent magnet motors when using, can judge whether according to this that the demagnetization situation produces.Then, please then consult Fig. 2 B, the process flow diagram that it demagnetizes and test for the demagnetization detection method of second embodiment of the invention.
In detail, before the test of demagnetizing, former this standard permanent magnet motor in order to primary standard has replaced with a permanent magnet motor to be measured.Annexation and this standard permanent magnet motor between this permanent magnet motor to be measured and other elements (such as power control unit and demagnetization pick-up unit) are identical with other interelement annexations, repeat no more in this.Execution in step S211 makes this calibration power value of this memory storage corresponding to a corresponding relation of this standard torque value and this rated rotational frequency value.The person of should be specified, step S211 also can carry out when aforementioned primary standard flow process, and its main purpose is the corresponding relation of the power of storage standard, torque and rotating speed in this storer.
Then, execution in step S213 makes a magnitude of voltage to be measured of this this direct supply of voltage sensor sensing.Execution in step S215 makes a current value to be measured of this this direct supply of current sensor sensing.Need the expositor, the execution sequence of above-mentioned steps S213 and step S215 can be exchanged mutually, can also carry out simultaneously, is not limited to this.
Immediately, execution in step S217, make this processing unit this magnitude of voltage to be measured of basis and this current value to be measured calculate a performance number to be measured of this direct supply, wherein this performance number to be measured is corresponding to a torque value to be measured and a tachometer value to be measured of this permanent magnet motor to be measured.Thus, execution in step 219, make this processing unit based on this corresponding relation, equal this standard torque value in this torque value to be measured, and when this tachometer value to be measured equals this rated rotational frequency value, judge a difference of this performance number to be measured and this calibration power value, and whether present a demagnetized state according to this permanent magnet motor to be measured of this diversity judgement.
In more detail, execution in step 221 makes this processing unit define a calibration power scope according to this calibration power value.Similarly, in the second embodiment, this calibration power scope can be situated between due to this calibration power value 80 percent between one of percentage 120.Then, execution in step S223 makes this processing unit in judging whether this difference exceeds this calibration power scope, if then execution in step S225 judges that this permanent magnet motor to be measured presents this demagnetized state; Otherwise execution in step S227 judges that this permanent magnet motor to be measured does not produce demagnetization.Similarly, Jie of aforementioned this calibration power scope limits enforcement aspect of the present invention, and it can carry out corresponding adjustment according to the difference of environment.
Must lay special stress on the person because result that primary standardization is learnt is reusable in permanent magnet motor to be measured of the same type, so step S201, step S203 and the performed primary standard flow process of step S205 can need not repetitive operation.In other words, when the corresponding relation of this calibration power value and this standard torque and this rated rotational frequency when being known, this demagnetization pick-up unit can omit step S201, step S203 and step S205, and directly execution in step S211 makes this corresponding relation of this memory storage.
Person more, except aforesaid operations, the second embodiment also can carry out the described flow process that reaches in steps of the first embodiment, and affiliated technical field has knows that usually the knowledgeable can be directly acquainted with the flow process that reaches in steps how the second embodiment carries out above-mentioned the first embodiment, so do not give unnecessary details.
In sum, demagnetization pick-up unit of the present invention and demagnetization detection side thereof are mainly used in being electrically connected in the power control unit of permanent magnet motor to be measured, and the power that is electrically connected to the direct supply of this power control unit by detection changes, and judges whether permanent-magnetic electric machine to be measured presents demagnetized state.Therefore, demagnetization pick-up unit of the present invention and demagnetization detection method thereof can be effectively and are correctly detected permanent magnet motor and whether present demagnetized state, guarantee further to use the security of electric motor car when driving of permanent magnet motor.
The above embodiments enforcement aspect of the present invention that only is used for giving an example, and explain technical characterictic of the present invention, be not to limit protection category of the present invention.Any be familiar with this operator can unlabored change or the arrangement of isotropism all belong to the scope that the present invention advocates, and the scope of the present invention should be as the criterion with claim.
Claims (8)
1. demagnetization pick-up unit is used for being electrically connected to a power control unit of a permanent magnet motor to be measured, and this power control unit more is electrically connected to a direct current power supply, and this demagnetization pick-up unit comprises:
One storer is in order to store a calibration power value corresponding to a standard torque value of a standard permanent magnet motor and a corresponding relation of a rated rotational frequency value;
One voltage sensor is in order to a magnitude of voltage to be measured of this direct supply of sensing;
One current sensor is in order to a current value to be measured of this direct supply of sensing;
One processing unit, be electrically connected to this storer, this voltage sensor and this current sensor, calculate a performance number to be measured of this direct supply in order to this magnitude of voltage to be measured of basis and this current value to be measured, wherein, this performance number to be measured is corresponding to a torque value to be measured and a tachometer value to be measured of this permanent magnet motor to be measured;
Wherein, this processing unit is more based on this corresponding relation, when this torque value to be measured equals this standard torque value and this tachometer value to be measured and equals this rated rotational frequency value, judge a difference of this performance number to be measured and this calibration power value, and present a demagnetized state according to this permanent-magnetic electric machine to be measured of this diversity judgement.
2. demagnetization pick-up unit as claimed in claim 1 is characterized in that, this processing unit is more in order to defining a calibration power scope according to this calibration power value, and when this difference exceeds this calibration power scope, judges that this permanent magnet motor presents this demagnetized state.
3. demagnetization pick-up unit as claimed in claim 2 is characterized in that, this calibration power scope between this calibration power value 80 percent between one of percentage 120.
4. output control device as claimed in claim 1, it is characterized in that, this calibration power value, is calculated according to a standard current value of a standard voltage value of this voltage sensor institute this direct supply of sensing and this current sensor institute this direct supply of sensing and to be got when this power control unit connects this standard permanent magnet motor by this processing unit.
5. demagnetization detection method that is used for a demagnetization pick-up unit, this demagnetization pick-up unit is used for being electrically connected to a power cell of a permanent magnet motor to be measured, this power control unit more is electrically connected a direct current power supply, this demagnetization pick-up unit comprises the processing unit that a storer, a voltage sensor, a current sensor and are electrically connected to this storer, this voltage sensor and this current sensor, and this demagnetization detection method comprises the following step:
(a) make this memory storage one calibration power value corresponding to a standard torque value of a standard permanent magnet motor and a corresponding relation of a rated rotational frequency value;
(b) make a magnitude of voltage to be measured of this this direct supply of voltage sensor sensing;
(c) make a current value to be measured of this this direct supply of current sensor sensing;
(d) make this processing unit this magnitude of voltage to be measured of basis and this current value to be measured calculate a performance number to be measured of this direct supply, wherein, this performance number to be measured is corresponding to a torque value to be measured and a tachometer value to be measured of this permanent magnet motor to be measured; And
(e) make this processing unit based on this corresponding relation, when this torque value to be measured equals this standard torque value and this tachometer value to be measured and equals this rated rotational frequency value, judge a difference of this performance number to be measured and this calibration power value, and present a demagnetized state according to this permanent magnet motor to be measured of this diversity judgement.
6. demagnetization detection method as claimed in claim 5 is characterized in that, this step (e) more comprises the following step:
(e1) make this processing unit define a calibration power scope according to this calibration power value;
(e2) make this processing unit when this difference exceeds this calibration power scope, judge that this permanent magnet motor to be measured presents this demagnetized state.
7. demagnetization detection method as claimed in claim 6 is characterized in that, this calibration power scope between this calibration power value 80 percent between one of percentage 120.
8. demagnetization detection method as claimed in claim 5 is characterized in that, more in the front the following step that comprises of step (a):
(a1) make this voltage sensor when this power control unit connects this standard permanent magnet motor, a standard voltage value of this direct supply of sensing;
(a2) make this current sensor when this power control unit connects this standard permanent magnet motor, a standard current value of this direct supply of sensing;
(a3) make this processing unit calculate this calibration power value according to this standard voltage value and this standard current value.
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| CN103439675A (en) * | 2013-09-27 | 2013-12-11 | 卢庆港 | Reconstruction-based demagnetization method for monitoring changing trend of degree of asymmetry of BH curve |
| CN103986397A (en) * | 2014-05-19 | 2014-08-13 | 安徽中家智锐科技有限公司 | Method for detecting fault of permanent magnet of brushless direct-current motor |
| CN106257299A (en) * | 2015-06-18 | 2016-12-28 | 现代自动车株式会社 | For the method diagnosing the demagnetization of the motor of environment-friendly type vehicle |
| CN107918107A (en) * | 2017-12-14 | 2018-04-17 | 安徽大学 | The demagnetization detection device and detection method of permanent magnetic linear synchronous motor |
| CN113325344A (en) * | 2021-04-29 | 2021-08-31 | 东风博泽汽车系统有限公司 | Automobile radiator electric fan demagnetization test device and method |
| US11626230B2 (en) | 2017-09-22 | 2023-04-11 | Shanghai Jieling Magnetic Material & Devices Co., Ltd. | Permanent magnet structure-based pipeline demagnetization device and application thereof |
| US11921174B1 (en) * | 2022-11-17 | 2024-03-05 | Hangzhou Magmax Technology Co., Ltd. | Method for identifying irreversible demagnetization of grain boundary diffusion NdFeB magnet |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030055584A1 (en) * | 2001-09-17 | 2003-03-20 | Abbas Raftari | Demagnetization for a motor in an electric or partially electric motor vehicle |
| JP4045028B2 (en) * | 1998-08-31 | 2008-02-13 | 本田技研工業株式会社 | Servo motor demagnetization inspection method |
| CN101149423A (en) * | 2007-11-02 | 2008-03-26 | 清华大学 | Permanent-magnetism synchronous motor permanent magnetic field aberration real-time detection and analysis method and device |
| KR100934041B1 (en) * | 2007-11-28 | 2009-12-29 | 주식회사 에이디티 | Permanent Magnet Electric Motor Potato Detection Device and Method of Hybrid Electric Vehicle |
| CN101770002A (en) * | 2008-12-30 | 2010-07-07 | 上海大郡动力控制技术有限公司 | Apparatus and method for monitoring demagnetization state of permanent magnet of permanent magnet motor |
| CN101930054A (en) * | 2010-05-11 | 2010-12-29 | 常州工学院 | Portable motor parameter-detecting device |
-
2011
- 2011-07-04 CN CN201110198530.8A patent/CN102866367B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4045028B2 (en) * | 1998-08-31 | 2008-02-13 | 本田技研工業株式会社 | Servo motor demagnetization inspection method |
| US20030055584A1 (en) * | 2001-09-17 | 2003-03-20 | Abbas Raftari | Demagnetization for a motor in an electric or partially electric motor vehicle |
| CN101149423A (en) * | 2007-11-02 | 2008-03-26 | 清华大学 | Permanent-magnetism synchronous motor permanent magnetic field aberration real-time detection and analysis method and device |
| KR100934041B1 (en) * | 2007-11-28 | 2009-12-29 | 주식회사 에이디티 | Permanent Magnet Electric Motor Potato Detection Device and Method of Hybrid Electric Vehicle |
| CN101770002A (en) * | 2008-12-30 | 2010-07-07 | 上海大郡动力控制技术有限公司 | Apparatus and method for monitoring demagnetization state of permanent magnet of permanent magnet motor |
| CN101930054A (en) * | 2010-05-11 | 2010-12-29 | 常州工学院 | Portable motor parameter-detecting device |
Non-Patent Citations (4)
| Title |
|---|
| KI-CHAN KIM等: ""Demagnetization Analysis of Permanent Magnets According to Rotor Types of Interior Permanent Magnent Synchronous Motor"", 《IEEE TRANSACTIONS ON MAGNETICS》, vol. 45, no. 6, 30 June 2009 (2009-06-30), XP011258075, DOI: doi:10.1109/TMAG.2009.2018661 * |
| KI-CHAN KIM等: ""The shape design of permanent magnent for permanent magnet synchronous motor considering partial demagnetization"", 《IEEE TRANSACTIONS ON MAGNETICS》, vol. 42, no. 10, 31 October 2006 (2006-10-31), XP011149240, DOI: doi:10.1109/TMAG.2006.879077 * |
| 庞科旺等: ""直流拖动系统失磁检测"", 《电气传动自动化》, vol. 18, no. 2, 31 May 1996 (1996-05-31) * |
| 朱洪波等: ""同步发电机失磁检测中的动量自适应算法"", 《电力系统及其自动化学报》, vol. 15, no. 5, 31 October 2003 (2003-10-31) * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103439675B (en) * | 2013-09-27 | 2015-12-02 | 卢庆港 | Based on the demagnetizing method that the BH curve asymmetric degree variation tendency of reconstruct monitors |
| CN103986397A (en) * | 2014-05-19 | 2014-08-13 | 安徽中家智锐科技有限公司 | Method for detecting fault of permanent magnet of brushless direct-current motor |
| CN103986397B (en) * | 2014-05-19 | 2016-08-24 | 安徽中家智锐科技有限公司 | Brshless DC motor permanent magnet fault detection method |
| CN106257299A (en) * | 2015-06-18 | 2016-12-28 | 现代自动车株式会社 | For the method diagnosing the demagnetization of the motor of environment-friendly type vehicle |
| CN106257299B (en) * | 2015-06-18 | 2020-02-18 | 现代自动车株式会社 | Method for diagnosing demagnetization of motor of eco-friendly vehicle |
| US11626230B2 (en) | 2017-09-22 | 2023-04-11 | Shanghai Jieling Magnetic Material & Devices Co., Ltd. | Permanent magnet structure-based pipeline demagnetization device and application thereof |
| CN107918107A (en) * | 2017-12-14 | 2018-04-17 | 安徽大学 | The demagnetization detection device and detection method of permanent magnetic linear synchronous motor |
| CN107918107B (en) * | 2017-12-14 | 2023-09-08 | 安徽大学 | Demagnetizing detection device and method for permanent magnet synchronous linear motor |
| CN113325344A (en) * | 2021-04-29 | 2021-08-31 | 东风博泽汽车系统有限公司 | Automobile radiator electric fan demagnetization test device and method |
| CN113325344B (en) * | 2021-04-29 | 2022-04-01 | 东风博泽汽车系统有限公司 | Automobile radiator electric fan demagnetization test device and method |
| US11921174B1 (en) * | 2022-11-17 | 2024-03-05 | Hangzhou Magmax Technology Co., Ltd. | Method for identifying irreversible demagnetization of grain boundary diffusion NdFeB magnet |
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